tools/perf/util/event.c

   1 #include <linux/types.h>
   2 #include <sys/mman.h>
   3 #include "event.h"
   4 #include "debug.h"
   5 #include "hist.h"
   6 #include "machine.h"
   7 #include "sort.h"
   8 #include "string.h"
   9 #include "strlist.h"
  10 #include "thread.h"
  11 #include "thread_map.h"
  12 #include "symbol/kallsyms.h"
  13 #include "asm/bug.h"
  14 #include "stat.h"
  15
  16 static const char *perf_event__names[] = {
  17         [0]                                     = "TOTAL",
  18         [PERF_RECORD_MMAP]                      = "MMAP",
  19         [PERF_RECORD_MMAP2]                     = "MMAP2",
  20         [PERF_RECORD_LOST]                      = "LOST",
  21         [PERF_RECORD_COMM]                      = "COMM",
  22         [PERF_RECORD_EXIT]                      = "EXIT",
  23         [PERF_RECORD_THROTTLE]                  = "THROTTLE",
  24         [PERF_RECORD_UNTHROTTLE]                = "UNTHROTTLE",
  25         [PERF_RECORD_FORK]                      = "FORK",
  26         [PERF_RECORD_READ]                      = "READ",
  27         [PERF_RECORD_SAMPLE]                    = "SAMPLE",
  28         [PERF_RECORD_AUX]                       = "AUX",
  29         [PERF_RECORD_ITRACE_START]              = "ITRACE_START",
  30         [PERF_RECORD_LOST_SAMPLES]              = "LOST_SAMPLES",
  31         [PERF_RECORD_SWITCH]                    = "SWITCH",
  32         [PERF_RECORD_SWITCH_CPU_WIDE]           = "SWITCH_CPU_WIDE",
  33         [PERF_RECORD_HEADER_ATTR]               = "ATTR",
  34         [PERF_RECORD_HEADER_EVENT_TYPE]         = "EVENT_TYPE",
  35         [PERF_RECORD_HEADER_TRACING_DATA]       = "TRACING_DATA",
  36         [PERF_RECORD_HEADER_BUILD_ID]           = "BUILD_ID",
  37         [PERF_RECORD_FINISHED_ROUND]            = "FINISHED_ROUND",
  38         [PERF_RECORD_ID_INDEX]                  = "ID_INDEX",
  39         [PERF_RECORD_AUXTRACE_INFO]             = "AUXTRACE_INFO",
  40         [PERF_RECORD_AUXTRACE]                  = "AUXTRACE",
  41         [PERF_RECORD_AUXTRACE_ERROR]            = "AUXTRACE_ERROR",
  42         [PERF_RECORD_THREAD_MAP]                = "THREAD_MAP",
  43         [PERF_RECORD_CPU_MAP]                   = "CPU_MAP",
  44         [PERF_RECORD_STAT_CONFIG]               = "STAT_CONFIG",
  45         [PERF_RECORD_STAT]                      = "STAT",
  46         [PERF_RECORD_STAT_ROUND]                = "STAT_ROUND",
  47         [PERF_RECORD_EVENT_UPDATE]              = "EVENT_UPDATE",
  48         [PERF_RECORD_TIME_CONV]                 = "TIME_CONV",
  49 };
  50
  51 const char *perf_event__name(unsigned int id)
  52 {
  53         if (id >= ARRAY_SIZE(perf_event__names))
  54                 return "INVALID";
  55         if (!perf_event__names[id])
  56                 return "UNKNOWN";
  57         return perf_event__names[id];
  58 }
  59
  60 static int perf_tool__process_synth_event(struct perf_tool *tool,
  61                                           union perf_event *event,
  62                                           struct machine *machine,
  63                                           perf_event__handler_t process)
  64 {
  65         struct perf_sample synth_sample = {
  66         .pid       = -1,
  67         .tid       = -1,
  68         .time      = -1,
  69         .stream_id = -1,
  70         .cpu       = -1,
  71         .period    = 1,
  72         .cpumode   = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK,
  73         };
  74
  75         return process(tool, event, &synth_sample, machine);
  76 };
  77
  78 /*
  79  * Assumes that the first 4095 bytes of /proc/pid/stat contains
  80  * the comm, tgid and ppid.
  81  */
  82 static int perf_event__get_comm_ids(pid_t pid, char *comm, size_t len,
  83                                     pid_t *tgid, pid_t *ppid)
  84 {
  85         char filename[PATH_MAX];
  86         char bf[4096];
  87         int fd;
  88         size_t size = 0;
  89         ssize_t n;
  90         char *nl, *name, *tgids, *ppids;
  91
  92         *tgid = -1;
  93         *ppid = -1;
  94
  95         snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
  96
  97         fd = open(filename, O_RDONLY);
  98         if (fd < 0) {
  99                 pr_debug("couldn't open %s\n", filename);
 100                 return -1;
 101         }
 102
 103         n = read(fd, bf, sizeof(bf) - 1);
 104         close(fd);
 105         if (n <= 0) {
 106                 pr_warning("Couldn't get COMM, tigd and ppid for pid %d\n",
 107                            pid);
 108                 return -1;
 109         }
 110         bf[n] = '\0';
 111
 112         name = strstr(bf, "Name:");
 113         tgids = strstr(bf, "Tgid:");
 114         ppids = strstr(bf, "PPid:");
 115
 116         if (name) {
 117                 name += 5;  /* strlen("Name:") */
 118
 119                 while (*name && isspace(*name))
 120                         ++name;
 121
 122                 nl = strchr(name, '\n');
 123                 if (nl)
 124                         *nl = '\0';
 125
 126                 size = strlen(name);
 127                 if (size >= len)
 128                         size = len - 1;
 129                 memcpy(comm, name, size);
 130                 comm[size] = '\0';
 131         } else {
 132                 pr_debug("Name: string not found for pid %d\n", pid);
 133         }
 134
 135         if (tgids) {
 136                 tgids += 5;  /* strlen("Tgid:") */
 137                 *tgid = atoi(tgids);
 138         } else {
 139                 pr_debug("Tgid: string not found for pid %d\n", pid);
 140         }
 141
 142         if (ppids) {
 143                 ppids += 5;  /* strlen("PPid:") */
 144                 *ppid = atoi(ppids);
 145         } else {
 146                 pr_debug("PPid: string not found for pid %d\n", pid);
 147         }
 148
 149         return 0;
 150 }
 151
 152 static int perf_event__prepare_comm(union perf_event *event, pid_t pid,
 153                                     struct machine *machine,
 154                                     pid_t *tgid, pid_t *ppid)
 155 {
 156         size_t size;
 157
 158         *ppid = -1;
 159
 160         memset(&event->comm, 0, sizeof(event->comm));
 161
 162         if (machine__is_host(machine)) {
 163                 if (perf_event__get_comm_ids(pid, event->comm.comm,
 164                                              sizeof(event->comm.comm),
 165                                              tgid, ppid) != 0) {
 166                         return -1;
 167                 }
 168         } else {
 169                 *tgid = machine->pid;
 170         }
 171
 172         if (*tgid < 0)
 173                 return -1;
 174
 175         event->comm.pid = *tgid;
 176         event->comm.header.type = PERF_RECORD_COMM;
 177
 178         size = strlen(event->comm.comm) + 1;
 179         size = PERF_ALIGN(size, sizeof(u64));
 180         memset(event->comm.comm + size, 0, machine->id_hdr_size);
 181         event->comm.header.size = (sizeof(event->comm) -
 182                                 (sizeof(event->comm.comm) - size) +
 183                                 machine->id_hdr_size);
 184         event->comm.tid = pid;
 185
 186         return 0;
 187 }
 188
 189 pid_t perf_event__synthesize_comm(struct perf_tool *tool,
 190                                          union perf_event *event, pid_t pid,
 191                                          perf_event__handler_t process,
 192                                          struct machine *machine)
 193 {
 194         pid_t tgid, ppid;
 195
 196         if (perf_event__prepare_comm(event, pid, machine, &tgid, &ppid) != 0)
 197                 return -1;
 198
 199         if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
 200                 return -1;
 201
 202         return tgid;
 203 }
 204
 205 static int perf_event__synthesize_fork(struct perf_tool *tool,
 206                                        union perf_event *event,
 207                                        pid_t pid, pid_t tgid, pid_t ppid,
 208                                        perf_event__handler_t process,
 209                                        struct machine *machine)
 210 {
 211         memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size);
 212
 213         /*
 214          * for main thread set parent to ppid from status file. For other
 215          * threads set parent pid to main thread. ie., assume main thread
 216          * spawns all threads in a process
 217         */
 218         if (tgid == pid) {
 219                 event->fork.ppid = ppid;
 220                 event->fork.ptid = ppid;
 221         } else {
 222                 event->fork.ppid = tgid;
 223                 event->fork.ptid = tgid;
 224         }
 225         event->fork.pid  = tgid;
 226         event->fork.tid  = pid;
 227         event->fork.header.type = PERF_RECORD_FORK;
 228
 229         event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size);
 230
 231         if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
 232                 return -1;
 233
 234         return 0;
 235 }
 236
 237 int perf_event__synthesize_mmap_events(struct perf_tool *tool,
 238                                        union perf_event *event,
 239                                        pid_t pid, pid_t tgid,
 240                                        perf_event__handler_t process,
 241                                        struct machine *machine,
 242                                        bool mmap_data,
 243                                        unsigned int proc_map_timeout)
 244 {
 245         char filename[PATH_MAX];
 246         FILE *fp;
 247         unsigned long long t;
 248         bool truncation = false;
 249         unsigned long long timeout = proc_map_timeout * 1000000ULL;
 250         int rc = 0;
 251
 252         if (machine__is_default_guest(machine))
 253                 return 0;
 254
 255         snprintf(filename, sizeof(filename), "%s/proc/%d/maps",
 256                  machine->root_dir, pid);
 257
 258         fp = fopen(filename, "r");
 259         if (fp == NULL) {
 260                 /*
 261                  * We raced with a task exiting - just return:
 262                  */
 263                 pr_debug("couldn't open %s\n", filename);
 264                 return -1;
 265         }
 266
 267         event->header.type = PERF_RECORD_MMAP2;
 268         t = rdclock();
 269
 270         while (1) {
 271                 char bf[BUFSIZ];
 272                 char prot[5];
 273                 char execname[PATH_MAX];
 274                 char anonstr[] = "//anon";
 275                 unsigned int ino;
 276                 size_t size;
 277                 ssize_t n;
 278
 279                 if (fgets(bf, sizeof(bf), fp) == NULL)
 280                         break;
 281
 282                 if ((rdclock() - t) > timeout) {
 283                         pr_warning("Reading %s time out. "
 284                                    "You may want to increase "
 285                                    "the time limit by --proc-map-timeout\n",
 286                                    filename);
 287                         truncation = true;
 288                         goto out;
 289                 }
 290
 291                 /* ensure null termination since stack will be reused. */
 292                 strcpy(execname, "");
 293
 294                 /* 00400000-0040c000 r-xp 00000000 fd:01 41038  /bin/cat */
 295                 n = sscanf(bf, "%"PRIx64"-%"PRIx64" %s %"PRIx64" %x:%x %u %[^\n]\n",
 296                        &event->mmap2.start, &event->mmap2.len, prot,
 297                        &event->mmap2.pgoff, &event->mmap2.maj,
 298                        &event->mmap2.min,
 299                        &ino, execname);
 300
 301                 /*
 302                  * Anon maps don't have the execname.
 303                  */
 304                 if (n < 7)
 305                         continue;
 306
 307                 event->mmap2.ino = (u64)ino;
 308
 309                 /*
 310                  * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
 311                  */
 312                 if (machine__is_host(machine))
 313                         event->header.misc = PERF_RECORD_MISC_USER;
 314                 else
 315                         event->header.misc = PERF_RECORD_MISC_GUEST_USER;
 316
 317                 /* map protection and flags bits */
 318                 event->mmap2.prot = 0;
 319                 event->mmap2.flags = 0;
 320                 if (prot[0] == 'r')
 321                         event->mmap2.prot |= PROT_READ;
 322                 if (prot[1] == 'w')
 323                         event->mmap2.prot |= PROT_WRITE;
 324                 if (prot[2] == 'x')
 325                         event->mmap2.prot |= PROT_EXEC;
 326
 327                 if (prot[3] == 's')
 328                         event->mmap2.flags |= MAP_SHARED;
 329                 else
 330                         event->mmap2.flags |= MAP_PRIVATE;
 331
 332                 if (prot[2] != 'x') {
 333                         if (!mmap_data || prot[0] != 'r')
 334                                 continue;
 335
 336                         event->header.misc |= PERF_RECORD_MISC_MMAP_DATA;
 337                 }
 338
 339 out:
 340                 if (truncation)
 341                         event->header.misc |= PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT;
 342
 343                 if (!strcmp(execname, ""))
 344                         strcpy(execname, anonstr);
 345
 346                 size = strlen(execname) + 1;
 347                 memcpy(event->mmap2.filename, execname, size);
 348                 size = PERF_ALIGN(size, sizeof(u64));
 349                 event->mmap2.len -= event->mmap.start;
 350                 event->mmap2.header.size = (sizeof(event->mmap2) -
 351                                         (sizeof(event->mmap2.filename) - size));
 352                 memset(event->mmap2.filename + size, 0, machine->id_hdr_size);
 353                 event->mmap2.header.size += machine->id_hdr_size;
 354                 event->mmap2.pid = tgid;
 355                 event->mmap2.tid = pid;
 356
 357                 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
 358                         rc = -1;
 359                         break;
 360                 }
 361
 362                 if (truncation)
 363                         break;
 364         }
 365
 366         fclose(fp);
 367         return rc;
 368 }
 369
 370 int perf_event__synthesize_modules(struct perf_tool *tool,
 371                                    perf_event__handler_t process,
 372                                    struct machine *machine)
 373 {
 374         int rc = 0;
 375         struct map *pos;
 376         struct map_groups *kmaps = &machine->kmaps;
 377         struct maps *maps = &kmaps->maps[MAP__FUNCTION];
 378         union perf_event *event = zalloc((sizeof(event->mmap) +
 379                                           machine->id_hdr_size));
 380         if (event == NULL) {
 381                 pr_debug("Not enough memory synthesizing mmap event "
 382                          "for kernel modules\n");
 383                 return -1;
 384         }
 385
 386         event->header.type = PERF_RECORD_MMAP;
 387
 388         /*
 389          * kernel uses 0 for user space maps, see kernel/perf_event.c
 390          * __perf_event_mmap
 391          */
 392         if (machine__is_host(machine))
 393                 event->header.misc = PERF_RECORD_MISC_KERNEL;
 394         else
 395                 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
 396
 397         for (pos = maps__first(maps); pos; pos = map__next(pos)) {
 398                 size_t size;
 399
 400                 if (__map__is_kernel(pos))
 401                         continue;
 402
 403                 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
 404                 event->mmap.header.type = PERF_RECORD_MMAP;
 405                 event->mmap.header.size = (sizeof(event->mmap) -
 406                                         (sizeof(event->mmap.filename) - size));
 407                 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
 408                 event->mmap.header.size += machine->id_hdr_size;
 409                 event->mmap.start = pos->start;
 410                 event->mmap.len   = pos->end - pos->start;
 411                 event->mmap.pid   = machine->pid;
 412
 413                 memcpy(event->mmap.filename, pos->dso->long_name,
 414                        pos->dso->long_name_len + 1);
 415                 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
 416                         rc = -1;
 417                         break;
 418                 }
 419         }
 420
 421         free(event);
 422         return rc;
 423 }
 424
 425 static int __event__synthesize_thread(union perf_event *comm_event,
 426                                       union perf_event *mmap_event,
 427                                       union perf_event *fork_event,
 428                                       pid_t pid, int full,
 429                                           perf_event__handler_t process,
 430                                       struct perf_tool *tool,
 431                                       struct machine *machine,
 432                                       bool mmap_data,
 433                                       unsigned int proc_map_timeout)
 434 {
 435         char filename[PATH_MAX];
 436         DIR *tasks;
 437         struct dirent *dirent;
 438         pid_t tgid, ppid;
 439         int rc = 0;
 440
 441         /* special case: only send one comm event using passed in pid */
 442         if (!full) {
 443                 tgid = perf_event__synthesize_comm(tool, comm_event, pid,
 444                                                    process, machine);
 445
 446                 if (tgid == -1)
 447                         return -1;
 448
 449                 return perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
 450                                                           process, machine, mmap_data,
 451                                                           proc_map_timeout);
 452         }
 453
 454         if (machine__is_default_guest(machine))
 455                 return 0;
 456
 457         snprintf(filename, sizeof(filename), "%s/proc/%d/task",
 458                  machine->root_dir, pid);
 459
 460         tasks = opendir(filename);
 461         if (tasks == NULL) {
 462                 pr_debug("couldn't open %s\n", filename);
 463                 return 0;
 464         }
 465
 466         while ((dirent = readdir(tasks)) != NULL) {
 467                 char *end;
 468                 pid_t _pid;
 469
 470                 _pid = strtol(dirent->d_name, &end, 10);
 471                 if (*end)
 472                         continue;
 473
 474                 rc = -1;
 475                 if (perf_event__prepare_comm(comm_event, _pid, machine,
 476                                              &tgid, &ppid) != 0)
 477                         break;
 478
 479                 if (perf_event__synthesize_fork(tool, fork_event, _pid, tgid,
 480                                                 ppid, process, machine) < 0)
 481                         break;
 482                 /*
 483                  * Send the prepared comm event
 484                  */
 485                 if (perf_tool__process_synth_event(tool, comm_event, machine, process) != 0)
 486                         break;
 487
 488                 rc = 0;
 489                 if (_pid == pid) {
 490                         /* process the parent's maps too */
 491                         rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
 492                                                 process, machine, mmap_data, proc_map_timeout);
 493                         if (rc)
 494                                 break;
 495                 }
 496         }
 497
 498         closedir(tasks);
 499         return rc;
 500 }
 501
 502 int perf_event__synthesize_thread_map(struct perf_tool *tool,
 503                                       struct thread_map *threads,
 504                                       perf_event__handler_t process,
 505                                       struct machine *machine,
 506                                       bool mmap_data,
 507                                       unsigned int proc_map_timeout)
 508 {
 509         union perf_event *comm_event, *mmap_event, *fork_event;
 510         int err = -1, thread, j;
 511
 512         comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
 513         if (comm_event == NULL)
 514                 goto out;
 515
 516         mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
 517         if (mmap_event == NULL)
 518                 goto out_free_comm;
 519
 520         fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
 521         if (fork_event == NULL)
 522                 goto out_free_mmap;
 523
 524         err = 0;
 525         for (thread = 0; thread < threads->nr; ++thread) {
 526                 if (__event__synthesize_thread(comm_event, mmap_event,
 527                                                fork_event,
 528                                                thread_map__pid(threads, thread), 0,
 529                                                process, tool, machine,
 530                                                mmap_data, proc_map_timeout)) {
 531                         err = -1;
 532                         break;
 533                 }
 534
 535                 /*
 536                  * comm.pid is set to thread group id by
 537                  * perf_event__synthesize_comm
 538                  */
 539                 if ((int) comm_event->comm.pid != thread_map__pid(threads, thread)) {
 540                         bool need_leader = true;
 541
 542                         /* is thread group leader in thread_map? */
 543                         for (j = 0; j < threads->nr; ++j) {
 544                                 if ((int) comm_event->comm.pid == thread_map__pid(threads, j)) {
 545                                         need_leader = false;
 546                                         break;
 547                                 }
 548                         }
 549
 550                         /* if not, generate events for it */
 551                         if (need_leader &&
 552                             __event__synthesize_thread(comm_event, mmap_event,
 553                                                        fork_event,
 554                                                        comm_event->comm.pid, 0,
 555                                                        process, tool, machine,
 556                                                        mmap_data, proc_map_timeout)) {
 557                                 err = -1;
 558                                 break;
 559                         }
 560                 }
 561         }
 562         free(fork_event);
 563 out_free_mmap:
 564         free(mmap_event);
 565 out_free_comm:
 566         free(comm_event);
 567 out:
 568         return err;
 569 }
 570
 571 int perf_event__synthesize_threads(struct perf_tool *tool,
 572                                    perf_event__handler_t process,
 573                                    struct machine *machine,
 574                                    bool mmap_data,
 575                                    unsigned int proc_map_timeout)
 576 {
 577         DIR *proc;
 578         char proc_path[PATH_MAX];
 579         struct dirent *dirent;
 580         union perf_event *comm_event, *mmap_event, *fork_event;
 581         int err = -1;
 582
 583         if (machine__is_default_guest(machine))
 584                 return 0;
 585
 586         comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
 587         if (comm_event == NULL)
 588                 goto out;
 589
 590         mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
 591         if (mmap_event == NULL)
 592                 goto out_free_comm;
 593
 594         fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
 595         if (fork_event == NULL)
 596                 goto out_free_mmap;
 597
 598         snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir);
 599         proc = opendir(proc_path);
 600
 601         if (proc == NULL)
 602                 goto out_free_fork;
 603
 604         while ((dirent = readdir(proc)) != NULL) {
 605                 char *end;
 606                 pid_t pid = strtol(dirent->d_name, &end, 10);
 607
 608                 if (*end) /* only interested in proper numerical dirents */
 609                         continue;
 610                 /*
 611                  * We may race with exiting thread, so don't stop just because
 612                  * one thread couldn't be synthesized.
 613                  */
 614                 __event__synthesize_thread(comm_event, mmap_event, fork_event, pid,
 615                                            1, process, tool, machine, mmap_data,
 616                                            proc_map_timeout);
 617         }
 618
 619         err = 0;
 620         closedir(proc);
 621 out_free_fork:
 622         free(fork_event);
 623 out_free_mmap:
 624         free(mmap_event);
 625 out_free_comm:
 626         free(comm_event);
 627 out:
 628         return err;
 629 }
 630
 631 struct process_symbol_args {
 632         const char *name;
 633         u64        start;
 634 };
 635
 636 static int find_symbol_cb(void *arg, const char *name, char type,
 637                           u64 start)
 638 {
 639         struct process_symbol_args *args = arg;
 640
 641         /*
 642          * Must be a function or at least an alias, as in PARISC64, where "_text" is
 643          * an 'A' to the same address as "_stext".
 644          */
 645         if (!(symbol_type__is_a(type, MAP__FUNCTION) ||
 646               type == 'A') || strcmp(name, args->name))
 647                 return 0;
 648
 649         args->start = start;
 650         return 1;
 651 }
 652
 653 u64 kallsyms__get_function_start(const char *kallsyms_filename,
 654                                  const char *symbol_name)
 655 {
 656         struct process_symbol_args args = { .name = symbol_name, };
 657
 658         if (kallsyms__parse(kallsyms_filename, &args, find_symbol_cb) <= 0)
 659                 return 0;
 660
 661         return args.start;
 662 }
 663
 664 int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
 665                                        perf_event__handler_t process,
 666                                        struct machine *machine)
 667 {
 668         size_t size;
 669         const char *mmap_name;
 670         char name_buff[PATH_MAX];
 671         struct map *map = machine__kernel_map(machine);
 672         struct kmap *kmap;
 673         int err;
 674         union perf_event *event;
 675
 676         if (map == NULL)
 677                 return -1;
 678
 679         /*
 680          * We should get this from /sys/kernel/sections/.text, but till that is
 681          * available use this, and after it is use this as a fallback for older
 682          * kernels.
 683          */
 684         event = zalloc((sizeof(event->mmap) + machine->id_hdr_size));
 685         if (event == NULL) {
 686                 pr_debug("Not enough memory synthesizing mmap event "
 687                          "for kernel modules\n");
 688                 return -1;
 689         }
 690
 691         mmap_name = machine__mmap_name(machine, name_buff, sizeof(name_buff));
 692         if (machine__is_host(machine)) {
 693                 /*
 694                  * kernel uses PERF_RECORD_MISC_USER for user space maps,
 695                  * see kernel/perf_event.c __perf_event_mmap
 696                  */
 697                 event->header.misc = PERF_RECORD_MISC_KERNEL;
 698         } else {
 699                 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
 700         }
 701
 702         kmap = map__kmap(map);
 703         size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
 704                         "%s%s", mmap_name, kmap->ref_reloc_sym->name) + 1;
 705         size = PERF_ALIGN(size, sizeof(u64));
 706         event->mmap.header.type = PERF_RECORD_MMAP;
 707         event->mmap.header.size = (sizeof(event->mmap) -
 708                         (sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
 709         event->mmap.pgoff = kmap->ref_reloc_sym->addr;
 710         event->mmap.start = map->start;
 711         event->mmap.len   = map->end - event->mmap.start;
 712         event->mmap.pid   = machine->pid;
 713
 714         err = perf_tool__process_synth_event(tool, event, machine, process);
 715         free(event);
 716
 717         return err;
 718 }
 719
 720 int perf_event__synthesize_thread_map2(struct perf_tool *tool,
 721                                       struct thread_map *threads,
 722                                       perf_event__handler_t process,
 723                                       struct machine *machine)
 724 {
 725         union perf_event *event;
 726         int i, err, size;
 727
 728         size  = sizeof(event->thread_map);
 729         size += threads->nr * sizeof(event->thread_map.entries[0]);
 730
 731         event = zalloc(size);
 732         if (!event)
 733                 return -ENOMEM;
 734
 735         event->header.type = PERF_RECORD_THREAD_MAP;
 736         event->header.size = size;
 737         event->thread_map.nr = threads->nr;
 738
 739         for (i = 0; i < threads->nr; i++) {
 740                 struct thread_map_event_entry *entry = &event->thread_map.entries[i];
 741                 char *comm = thread_map__comm(threads, i);
 742
 743                 if (!comm)
 744                         comm = (char *) "";
 745
 746                 entry->pid = thread_map__pid(threads, i);
 747                 strncpy((char *) &entry->comm, comm, sizeof(entry->comm));
 748         }
 749
 750         err = process(tool, event, NULL, machine);
 751
 752         free(event);
 753         return err;
 754 }
 755
 756 static void synthesize_cpus(struct cpu_map_entries *cpus,
 757                             struct cpu_map *map)
 758 {
 759         int i;
 760
 761         cpus->nr = map->nr;
 762
 763         for (i = 0; i < map->nr; i++)
 764                 cpus->cpu[i] = map->map[i];
 765 }
 766
 767 static void synthesize_mask(struct cpu_map_mask *mask,
 768                             struct cpu_map *map, int max)
 769 {
 770         int i;
 771
 772         mask->nr = BITS_TO_LONGS(max);
 773         mask->long_size = sizeof(long);
 774
 775         for (i = 0; i < map->nr; i++)
 776                 set_bit(map->map[i], mask->mask);
 777 }
 778
 779 static size_t cpus_size(struct cpu_map *map)
 780 {
 781         return sizeof(struct cpu_map_entries) + map->nr * sizeof(u16);
 782 }
 783
 784 static size_t mask_size(struct cpu_map *map, int *max)
 785 {
 786         int i;
 787
 788         *max = 0;
 789
 790         for (i = 0; i < map->nr; i++) {
 791                 /* bit possition of the cpu is + 1 */
 792                 int bit = map->map[i] + 1;
 793
 794                 if (bit > *max)
 795                         *max = bit;
 796         }
 797
 798         return sizeof(struct cpu_map_mask) + BITS_TO_LONGS(*max) * sizeof(long);
 799 }
 800
 801 void *cpu_map_data__alloc(struct cpu_map *map, size_t *size, u16 *type, int *max)
 802 {
 803         size_t size_cpus, size_mask;
 804         bool is_dummy = cpu_map__empty(map);
 805
 806         /*
 807          * Both array and mask data have variable size based
 808          * on the number of cpus and their actual values.
 809          * The size of the 'struct cpu_map_data' is:
 810          *
 811          *   array = size of 'struct cpu_map_entries' +
 812          *           number of cpus * sizeof(u64)
 813          *
 814          *   mask  = size of 'struct cpu_map_mask' +
 815          *           maximum cpu bit converted to size of longs
 816          *
 817          * and finaly + the size of 'struct cpu_map_data'.
 818          */
 819         size_cpus = cpus_size(map);
 820         size_mask = mask_size(map, max);
 821
 822         if (is_dummy || (size_cpus < size_mask)) {
 823                 *size += size_cpus;
 824                 *type  = PERF_CPU_MAP__CPUS;
 825         } else {
 826                 *size += size_mask;
 827                 *type  = PERF_CPU_MAP__MASK;
 828         }
 829
 830         *size += sizeof(struct cpu_map_data);
 831         return zalloc(*size);
 832 }
 833
 834 void cpu_map_data__synthesize(struct cpu_map_data *data, struct cpu_map *map,
 835                               u16 type, int max)
 836 {
 837         data->type = type;
 838
 839         switch (type) {
 840         case PERF_CPU_MAP__CPUS:
 841                 synthesize_cpus((struct cpu_map_entries *) data->data, map);
 842                 break;
 843         case PERF_CPU_MAP__MASK:
 844                 synthesize_mask((struct cpu_map_mask *) data->data, map, max);
 845         default:
 846                 break;
 847         };
 848 }
 849
 850 static struct cpu_map_event* cpu_map_event__new(struct cpu_map *map)
 851 {
 852         size_t size = sizeof(struct cpu_map_event);
 853         struct cpu_map_event *event;
 854         int max;
 855         u16 type;
 856
 857         event = cpu_map_data__alloc(map, &size, &type, &max);
 858         if (!event)
 859                 return NULL;
 860
 861         event->header.type = PERF_RECORD_CPU_MAP;
 862         event->header.size = size;
 863         event->data.type   = type;
 864
 865         cpu_map_data__synthesize(&event->data, map, type, max);
 866         return event;
 867 }
 868
 869 int perf_event__synthesize_cpu_map(struct perf_tool *tool,
 870                                    struct cpu_map *map,
 871                                    perf_event__handler_t process,
 872                                    struct machine *machine)
 873 {
 874         struct cpu_map_event *event;
 875         int err;
 876
 877         event = cpu_map_event__new(map);
 878         if (!event)
 879                 return -ENOMEM;
 880
 881         err = process(tool, (union perf_event *) event, NULL, machine);
 882
 883         free(event);
 884         return err;
 885 }
 886
 887 int perf_event__synthesize_stat_config(struct perf_tool *tool,
 888                                        struct perf_stat_config *config,
 889                                        perf_event__handler_t process,
 890                                        struct machine *machine)
 891 {
 892         struct stat_config_event *event;
 893         int size, i = 0, err;
 894
 895         size  = sizeof(*event);
 896         size += (PERF_STAT_CONFIG_TERM__MAX * sizeof(event->data[0]));
 897
 898         event = zalloc(size);
 899         if (!event)
 900                 return -ENOMEM;
 901
 902         event->header.type = PERF_RECORD_STAT_CONFIG;
 903         event->header.size = size;
 904         event->nr          = PERF_STAT_CONFIG_TERM__MAX;
 905
 906 #define ADD(__term, __val)                                      \
 907         event->data[i].tag = PERF_STAT_CONFIG_TERM__##__term;   \
 908         event->data[i].val = __val;                             \
 909         i++;
 910
 911         ADD(AGGR_MODE,  config->aggr_mode)
 912         ADD(INTERVAL,   config->interval)
 913         ADD(SCALE,      config->scale)
 914
 915         WARN_ONCE(i != PERF_STAT_CONFIG_TERM__MAX,
 916                   "stat config terms unbalanced\n");
 917 #undef ADD
 918
 919         err = process(tool, (union perf_event *) event, NULL, machine);
 920
 921         free(event);
 922         return err;
 923 }
 924
 925 int perf_event__synthesize_stat(struct perf_tool *tool,
 926                                 u32 cpu, u32 thread, u64 id,
 927                                 struct perf_counts_values *count,
 928                                 perf_event__handler_t process,
 929                                 struct machine *machine)
 930 {
 931         struct stat_event event;
 932
 933         event.header.type = PERF_RECORD_STAT;
 934         event.header.size = sizeof(event);
 935         event.header.misc = 0;
 936
 937         event.id        = id;
 938         event.cpu       = cpu;
 939         event.thread    = thread;
 940         event.val       = count->val;
 941         event.ena       = count->ena;
 942         event.run       = count->run;
 943
 944         return process(tool, (union perf_event *) &event, NULL, machine);
 945 }
 946
 947 int perf_event__synthesize_stat_round(struct perf_tool *tool,
 948                                       u64 evtime, u64 type,
 949                                       perf_event__handler_t process,
 950                                       struct machine *machine)
 951 {
 952         struct stat_round_event event;
 953
 954         event.header.type = PERF_RECORD_STAT_ROUND;
 955         event.header.size = sizeof(event);
 956         event.header.misc = 0;
 957
 958         event.time = evtime;
 959         event.type = type;
 960
 961         return process(tool, (union perf_event *) &event, NULL, machine);
 962 }
 963
 964 void perf_event__read_stat_config(struct perf_stat_config *config,
 965                                   struct stat_config_event *event)
 966 {
 967         unsigned i;
 968
 969         for (i = 0; i < event->nr; i++) {
 970
 971                 switch (event->data[i].tag) {
 972 #define CASE(__term, __val)                                     \
 973                 case PERF_STAT_CONFIG_TERM__##__term:           \
 974                         config->__val = event->data[i].val;     \
 975                         break;
 976
 977                 CASE(AGGR_MODE, aggr_mode)
 978                 CASE(SCALE,     scale)
 979                 CASE(INTERVAL,  interval)
 980 #undef CASE
 981                 default:
 982                         pr_warning("unknown stat config term %" PRIu64 "\n",
 983                                    event->data[i].tag);
 984                 }
 985         }
 986 }
 987
 988 size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
 989 {
 990         const char *s;
 991
 992         if (event->header.misc & PERF_RECORD_MISC_COMM_EXEC)
 993                 s = " exec";
 994         else
 995                 s = "";
 996
 997         return fprintf(fp, "%s: %s:%d/%d\n", s, event->comm.comm, event->comm.pid, event->comm.tid);
 998 }
 999
1000 int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
1001                              union perf_event *event,
1002                              struct perf_sample *sample,
1003                              struct machine *machine)
1004 {
1005         return machine__process_comm_event(machine, event, sample);
1006 }
1007
1008 int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
1009                              union perf_event *event,
1010                              struct perf_sample *sample,
1011                              struct machine *machine)
1012 {
1013         return machine__process_lost_event(machine, event, sample);
1014 }
1015
1016 int perf_event__process_aux(struct perf_tool *tool __maybe_unused,
1017                             union perf_event *event,
1018                             struct perf_sample *sample __maybe_unused,
1019                             struct machine *machine)
1020 {
1021         return machine__process_aux_event(machine, event);
1022 }
1023
1024 int perf_event__process_itrace_start(struct perf_tool *tool __maybe_unused,
1025                                      union perf_event *event,
1026                                      struct perf_sample *sample __maybe_unused,
1027                                      struct machine *machine)
1028 {
1029         return machine__process_itrace_start_event(machine, event);
1030 }
1031
1032 int perf_event__process_lost_samples(struct perf_tool *tool __maybe_unused,
1033                                      union perf_event *event,
1034                                      struct perf_sample *sample,
1035                                      struct machine *machine)
1036 {
1037         return machine__process_lost_samples_event(machine, event, sample);
1038 }
1039
1040 int perf_event__process_switch(struct perf_tool *tool __maybe_unused,
1041                                union perf_event *event,
1042                                struct perf_sample *sample __maybe_unused,
1043                                struct machine *machine)
1044 {
1045         return machine__process_switch_event(machine, event);
1046 }
1047
1048 size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
1049 {
1050         return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %c %s\n",
1051                        event->mmap.pid, event->mmap.tid, event->mmap.start,
1052                        event->mmap.len, event->mmap.pgoff,
1053                        (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
1054                        event->mmap.filename);
1055 }
1056
1057 size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
1058 {
1059         return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64
1060                            " %02x:%02x %"PRIu64" %"PRIu64"]: %c%c%c%c %s\n",
1061                        event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
1062                        event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
1063                        event->mmap2.min, event->mmap2.ino,
1064                        event->mmap2.ino_generation,
1065                        (event->mmap2.prot & PROT_READ) ? 'r' : '-',
1066                        (event->mmap2.prot & PROT_WRITE) ? 'w' : '-',
1067                        (event->mmap2.prot & PROT_EXEC) ? 'x' : '-',
1068                        (event->mmap2.flags & MAP_SHARED) ? 's' : 'p',
1069                        event->mmap2.filename);
1070 }
1071
1072 size_t perf_event__fprintf_thread_map(union perf_event *event, FILE *fp)
1073 {
1074         struct thread_map *threads = thread_map__new_event(&event->thread_map);
1075         size_t ret;
1076
1077         ret = fprintf(fp, " nr: ");
1078
1079         if (threads)
1080                 ret += thread_map__fprintf(threads, fp);
1081         else
1082                 ret += fprintf(fp, "failed to get threads from event\n");
1083
1084         thread_map__put(threads);
1085         return ret;
1086 }
1087
1088 size_t perf_event__fprintf_cpu_map(union perf_event *event, FILE *fp)
1089 {
1090         struct cpu_map *cpus = cpu_map__new_data(&event->cpu_map.data);
1091         size_t ret;
1092
1093         ret = fprintf(fp, " nr: ");
1094
1095         if (cpus)
1096                 ret += cpu_map__fprintf(cpus, fp);
1097         else
1098                 ret += fprintf(fp, "failed to get cpumap from event\n");
1099
1100         cpu_map__put(cpus);
1101         return ret;
1102 }
1103
1104 int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
1105                              union perf_event *event,
1106                              struct perf_sample *sample,
1107                              struct machine *machine)
1108 {
1109         return machine__process_mmap_event(machine, event, sample);
1110 }
1111
1112 int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused,
1113                              union perf_event *event,
1114                              struct perf_sample *sample,
1115                              struct machine *machine)
1116 {
1117         return machine__process_mmap2_event(machine, event, sample);
1118 }
1119
1120 size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
1121 {
1122         return fprintf(fp, "(%d:%d):(%d:%d)\n",
1123                        event->fork.pid, event->fork.tid,
1124                        event->fork.ppid, event->fork.ptid);
1125 }
1126
1127 int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
1128                              union perf_event *event,
1129                              struct perf_sample *sample,
1130                              struct machine *machine)
1131 {
1132         return machine__process_fork_event(machine, event, sample);
1133 }
1134
1135 int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
1136                              union perf_event *event,
1137                              struct perf_sample *sample,
1138                              struct machine *machine)
1139 {
1140         return machine__process_exit_event(machine, event, sample);
1141 }
1142
1143 size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp)
1144 {
1145         return fprintf(fp, " offset: %#"PRIx64" size: %#"PRIx64" flags: %#"PRIx64" [%s%s]\n",
1146                        event->aux.aux_offset, event->aux.aux_size,
1147                        event->aux.flags,
1148                        event->aux.flags & PERF_AUX_FLAG_TRUNCATED ? "T" : "",
1149                        event->aux.flags & PERF_AUX_FLAG_OVERWRITE ? "O" : "");
1150 }
1151
1152 size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp)
1153 {
1154         return fprintf(fp, " pid: %u tid: %u\n",
1155                        event->itrace_start.pid, event->itrace_start.tid);
1156 }
1157
1158 size_t perf_event__fprintf_switch(union perf_event *event, FILE *fp)
1159 {
1160         bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT;
1161         const char *in_out = out ? "OUT" : "IN ";
1162
1163         if (event->header.type == PERF_RECORD_SWITCH)
1164                 return fprintf(fp, " %s\n", in_out);
1165
1166         return fprintf(fp, " %s  %s pid/tid: %5u/%-5u\n",
1167                        in_out, out ? "next" : "prev",
1168                        event->context_switch.next_prev_pid,
1169                        event->context_switch.next_prev_tid);
1170 }
1171
1172 size_t perf_event__fprintf(union perf_event *event, FILE *fp)
1173 {
1174         size_t ret = fprintf(fp, "PERF_RECORD_%s",
1175                              perf_event__name(event->header.type));
1176
1177         switch (event->header.type) {
1178         case PERF_RECORD_COMM:
1179                 ret += perf_event__fprintf_comm(event, fp);
1180                 break;
1181         case PERF_RECORD_FORK:
1182         case PERF_RECORD_EXIT:
1183                 ret += perf_event__fprintf_task(event, fp);
1184                 break;
1185         case PERF_RECORD_MMAP:
1186                 ret += perf_event__fprintf_mmap(event, fp);
1187                 break;
1188         case PERF_RECORD_MMAP2:
1189                 ret += perf_event__fprintf_mmap2(event, fp);
1190                 break;
1191         case PERF_RECORD_AUX:
1192                 ret += perf_event__fprintf_aux(event, fp);
1193                 break;
1194         case PERF_RECORD_ITRACE_START:
1195                 ret += perf_event__fprintf_itrace_start(event, fp);
1196                 break;
1197         case PERF_RECORD_SWITCH:
1198         case PERF_RECORD_SWITCH_CPU_WIDE:
1199                 ret += perf_event__fprintf_switch(event, fp);
1200                 break;
1201         default:
1202                 ret += fprintf(fp, "\n");
1203         }
1204
1205         return ret;
1206 }
1207
1208 int perf_event__process(struct perf_tool *tool __maybe_unused,
1209                         union perf_event *event,
1210                         struct perf_sample *sample,
1211                         struct machine *machine)
1212 {
1213         return machine__process_event(machine, event, sample);
1214 }
1215
1216 void thread__find_addr_map(struct thread *thread, u8 cpumode,
1217                            enum map_type type, u64 addr,
1218                            struct addr_location *al)
1219 {
1220         struct map_groups *mg = thread->mg;
1221         struct machine *machine = mg->machine;
1222         bool load_map = false;
1223
1224         al->machine = machine;
1225         al->thread = thread;
1226         al->addr = addr;
1227         al->cpumode = cpumode;
1228         al->filtered = 0;
1229
1230         if (machine == NULL) {
1231                 al->map = NULL;
1232                 return;
1233         }
1234
1235         if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
1236                 al->level = 'k';
1237                 mg = &machine->kmaps;
1238                 load_map = true;
1239         } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
1240                 al->level = '.';
1241         } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
1242                 al->level = 'g';
1243                 mg = &machine->kmaps;
1244                 load_map = true;
1245         } else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) {
1246                 al->level = 'u';
1247         } else {
1248                 al->level = 'H';
1249                 al->map = NULL;
1250
1251                 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
1252                         cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
1253                         !perf_guest)
1254                         al->filtered |= (1 << HIST_FILTER__GUEST);
1255                 if ((cpumode == PERF_RECORD_MISC_USER ||
1256                         cpumode == PERF_RECORD_MISC_KERNEL) &&
1257                         !perf_host)
1258                         al->filtered |= (1 << HIST_FILTER__HOST);
1259
1260                 return;
1261         }
1262 try_again:
1263         al->map = map_groups__find(mg, type, al->addr);
1264         if (al->map == NULL) {
1265                 /*
1266                  * If this is outside of all known maps, and is a negative
1267                  * address, try to look it up in the kernel dso, as it might be
1268                  * a vsyscall or vdso (which executes in user-mode).
1269                  *
1270                  * XXX This is nasty, we should have a symbol list in the
1271                  * "[vdso]" dso, but for now lets use the old trick of looking
1272                  * in the whole kernel symbol list.
1273                  */
1274                 if (cpumode == PERF_RECORD_MISC_USER && machine &&
1275                     mg != &machine->kmaps &&
1276                     machine__kernel_ip(machine, al->addr)) {
1277                         mg = &machine->kmaps;
1278                         load_map = true;
1279                         goto try_again;
1280                 }
1281         } else {
1282                 /*
1283                  * Kernel maps might be changed when loading symbols so loading
1284                  * must be done prior to using kernel maps.
1285                  */
1286                 if (load_map)
1287                         map__load(al->map, machine->symbol_filter);
1288                 al->addr = al->map->map_ip(al->map, al->addr);
1289         }
1290 }
1291
1292 void thread__find_addr_location(struct thread *thread,
1293                                 u8 cpumode, enum map_type type, u64 addr,
1294                                 struct addr_location *al)
1295 {
1296         thread__find_addr_map(thread, cpumode, type, addr, al);
1297         if (al->map != NULL)
1298                 al->sym = map__find_symbol(al->map, al->addr,
1299                                            thread->mg->machine->symbol_filter);
1300         else
1301                 al->sym = NULL;
1302 }
1303
1304 /*
1305  * Callers need to drop the reference to al->thread, obtained in
1306  * machine__findnew_thread()
1307  */
1308 int machine__resolve(struct machine *machine, struct addr_location *al,
1309                      struct perf_sample *sample)
1310 {
1311         struct thread *thread = machine__findnew_thread(machine, sample->pid,
1312                                                         sample->tid);
1313
1314         if (thread == NULL)
1315                 return -1;
1316
1317         dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
1318         /*
1319          * Have we already created the kernel maps for this machine?
1320          *
1321          * This should have happened earlier, when we processed the kernel MMAP
1322          * events, but for older perf.data files there was no such thing, so do
1323          * it now.
1324          */
1325         if (sample->cpumode == PERF_RECORD_MISC_KERNEL &&
1326             machine__kernel_map(machine) == NULL)
1327                 machine__create_kernel_maps(machine);
1328
1329         thread__find_addr_map(thread, sample->cpumode, MAP__FUNCTION, sample->ip, al);
1330         dump_printf(" ...... dso: %s\n",
1331                     al->map ? al->map->dso->long_name :
1332                         al->level == 'H' ? "[hypervisor]" : "<not found>");
1333
1334         if (thread__is_filtered(thread))
1335                 al->filtered |= (1 << HIST_FILTER__THREAD);
1336
1337         al->sym = NULL;
1338         al->cpu = sample->cpu;
1339         al->socket = -1;
1340
1341         if (al->cpu >= 0) {
1342                 struct perf_env *env = machine->env;
1343
1344                 if (env && env->cpu)
1345                         al->socket = env->cpu[al->cpu].socket_id;
1346         }
1347
1348         if (al->map) {
1349                 struct dso *dso = al->map->dso;
1350
1351                 if (symbol_conf.dso_list &&
1352                     (!dso || !(strlist__has_entry(symbol_conf.dso_list,
1353                                                   dso->short_name) ||
1354                                (dso->short_name != dso->long_name &&
1355                                 strlist__has_entry(symbol_conf.dso_list,
1356                                                    dso->long_name))))) {
1357                         al->filtered |= (1 << HIST_FILTER__DSO);
1358                 }
1359
1360                 al->sym = map__find_symbol(al->map, al->addr,
1361                                            machine->symbol_filter);
1362         }
1363
1364         if (symbol_conf.sym_list &&
1365                 (!al->sym || !strlist__has_entry(symbol_conf.sym_list,
1366                                                 al->sym->name))) {
1367                 al->filtered |= (1 << HIST_FILTER__SYMBOL);
1368         }
1369
1370         return 0;
1371 }
1372
1373 /*
1374  * The preprocess_sample method will return with reference counts for the
1375  * in it, when done using (and perhaps getting ref counts if needing to
1376  * keep a pointer to one of those entries) it must be paired with
1377  * addr_location__put(), so that the refcounts can be decremented.
1378  */
1379 void addr_location__put(struct addr_location *al)
1380 {
1381         thread__zput(al->thread);
1382 }
1383
1384 bool is_bts_event(struct perf_event_attr *attr)
1385 {
1386         return attr->type == PERF_TYPE_HARDWARE &&
1387                (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
1388                attr->sample_period == 1;
1389 }
1390
1391 bool sample_addr_correlates_sym(struct perf_event_attr *attr)
1392 {
1393         if (attr->type == PERF_TYPE_SOFTWARE &&
1394             (attr->config == PERF_COUNT_SW_PAGE_FAULTS ||
1395              attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
1396              attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ))
1397                 return true;
1398
1399         if (is_bts_event(attr))
1400                 return true;
1401
1402         return false;
1403 }
1404
1405 void thread__resolve(struct thread *thread, struct addr_location *al,
1406                      struct perf_sample *sample)
1407 {
1408         thread__find_addr_map(thread, sample->cpumode, MAP__FUNCTION, sample->addr, al);
1409         if (!al->map)
1410                 thread__find_addr_map(thread, sample->cpumode, MAP__VARIABLE,
1411                                       sample->addr, al);
1412
1413         al->cpu = sample->cpu;
1414         al->sym = NULL;
1415
1416         if (al->map)
1417                 al->sym = map__find_symbol(al->map, al->addr, NULL);
1418 }